Mining-machine



(No Model.) 2 SheetsSheet 1. L. W. LE GRAND. MINING MACHINE.-

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(No Model.) 2 Sheets- Sheet 2.

MINING MACHINE.

No. 541,171. Patented June 18,1895.

Irykglr Zewcs 74(19/ Grand UNITED STATES PATENT OFFICE.

LEWIS 7. LE GRAND, OF \VILKES-BARRE, PENNSYLVANIA.

MINING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 541,171, dated June 18,1895.

Application filed June 4, 1394- Serial No. 513,431. (No model.)

To all whom it may concern.-

Be it known that I, LEWIS W. LE GRAND, a citizen of the United States,residing at Wilkes-Barre, in the county of Luzerne and State ofPennsylvania, have invented a new and useful Mining-Machine, of whichthe following is a specification.

This invention relates to mining machines; and it has for its object toeffect certain'improvements in machines of that class that are employedfor drilling holes in coal or rock preparatory to blasting, whereby theefficiency of such machines shall be greatly increased.

To this end the main and primary object of the present invention is toso construct a mining or drilling machine with the several constituentparts thereof so arranged and connected as to render the machine quicklyand easily manipulated, while at the same time insuring an efficientoperation for rapidly drilling or boring the hole in the rock or coal.

With these and other objects in view, which will readily appear. as thenature of the invention is better understood, the same consists in thenovel construction, combination, and arrangement of parts hereinaftermore fully described, illustrated, and claimed.

In the accompanying drawings, Figure 1 is a side elevation of amining-machine constructed in accordance with this invention as set upfor operation. Fig. 2 is a detail sectional view on the line 0c 00 ofFig. 1. Fig. 3 is a detail elevation of one of the extensionauger-sections. Fig. 4 is an enlarged detail elevation showing clearlythe detachable connection between the auger-sections. Fig. 5 is a detailsectional view on the line y y of Fig. 4.. Fig. 6 is an enlarged detailelevation of one end of the first or advance auger-section provided withthe tool-sockets. Fig. '7 is a detail sectional view on the line 2 z ofFig. 6. Fig. 8 is a detail elevation of the pair of cutters. Fig. 9 is adetail sectional view on the line 9 9 of Fig. 8.

Referring to the accompanying drawings, 1 designates a squared or othersuitable shaped fastening bar tapered at one end as at 2, for insertioninto a previously drilled hole in the rock or coal to provide for thesupport of the machine, and said fastening bar is provided at itsopposite end with a spindle openin g 3, adapted to loosely accommodatetherein the pivot spindle 4:, of the supporting yoke 5. The supportingyoke 5, is provided with the ordinary bearing openings 6, that pivotallyreceive the opposite trunnions 7, of the feed nut 8, which is thussupported for a swiveled movement on the fastening bar 1, and accom-'modates therein the feed screw 9. The feed screw 9, is provided at bothends thereof with the tapered connecting plugs or tenons 10, throughwhich are transversely passed the lock-pins 11, projecting beyondopposite sides of said plugs or tenons.

The tapered connecting plug or tenon at one end of the feed screw 9, isadapted to detachably receive the tapered attaching socket 12,at one endof the crank turning handle 13, that simulates in appearance an ordinarybrace handle and provides means for revolving or turning the screwthrough its nut in order to feed the drill into the rock. The attachingsocket 12, of the handle 13, is interiorly tapered to correspond withthe taper of the plug or tenon on which it is fitted, and atits flaredend the socket 12, is provided at diametrically 0pposite sides with theT-shaped slots 13 which are adapted to be passed over the projecting endof one of the lock pins 11 and engaged therewith by a turning of thecrank handle, whereby the same is securely connected with the feed screwand prevented from becoming detached therefrom during the operation ofthe machine. The said T-shaped slots 13, are so disposed that the crossslots which extend to both sides of the other slots at one end thereofare disposed transversely of the socket 12, so that a turning of thesocket after having been placed on the plug or tenon will engage thelock pin at either side of the longitudinally disposed portions of saidT- shaped slots. 7

The tapered connecting plug or tenon 10, at the end of the feed screw 9,opposite the handle is adapted to have detachably connected therewithone end of the main or advance auger section 14, when the machine isfirst started to commence t-hehole in the rock or coal. The drill auger14, consists of a hol 10w ortubular body 15, and a double worm or screwflange 16, spirally arranged on the exterior of such body to provide forrelieving the hole being drilled of the cuttings, and to maintain aclear passage for such cuttings in order that the hole may bequickly-and-properly drilled, and while securing this important functionthe hollow or tubular body of the auger renders the same much lighterthan those ordinarily employed and therefore provides an anger moreeasily manipulated.

While the drill auger 14, is preferably provided with a double wormorscrew flange 16, such flange may be a single continuous flange ifdesired, and at one end the said drill anger is provided with a taperedattaching socket 17, corresponding to the handle socket, and atdiametrically opposite sides of the flared end of said socket with theT-shaped slots 18, that are adapted to be engaged with the lock pin atthe end of the feed screw 9, opposite the end to which the socket of theturning handle is attached, and by reason of detachably connecting thehandle socket and the socket at one end of the drill auger to theopposite ends of the feed screw in the manner described, the machinecanbe quickly adjusted and handled while at the same time providing aconnection which renders it impossible for the parts to becomedisconnected during op eration of the machine.

The main or advance auger drill section 14, is provided at the endopposite its attaching socket 17 with the separate angular tool sockets19 and 20, respectively, the socket 19, be ing arranged in a line withthe center of the auger and the socket 20, being disposed eccentric tothe longitudinal center of the auger and of a smaller size than thecentral socket 19. The sockets 19 and 20 are similar in cross sectionand are adapted to adjustably and detachably receive therein the centerand side cutting bits 21 and 22 respectively. The bits 21 and 22 arecorrespondingly shaped to the sockets in which they are fitted and arearranged in said sockets with one corner or angle thereof adjacentlydisposed, and in such adjacently disposed corners or angles, the saidcutting bits 21 and 22 are-provided with the semicircular notches 23,which are adapted to register with each other to form circularadjustment holes for the reception of the fastening pin 24, that ispassed transversely through a pin opening 25, formedin the drill auger14, at a point between the sockets 19 and 20, in order that the pin 24,may engage the registering notches thereof. By reason of fastening thecutting bitsin the tool sockets at one end of the anger in the mannerdescribed the same are held firmly in position for operating upon therock or coal, while at the same time being capable of an adjustmentoutward in order to compensate for wear. The central cutting bit 21, isof an ordinary configuration and the eccentric or side bit 22, thatdescribes a circle of move-r ment, to bore out the hole, is providedwith a laterally curved cutting edge 26, that insures a perfect roundingout of the hole.

After the main or advance auger section 14 has been carried into therock or coal as far as the length thereof the feed screw 9, isdisconnected therefrom by disengaging the lockpin from the T shaped slotin the socket end, and such feed screw is reversed in the ordinarymanner to admit of the attachment of an extension auger section 27. sionauger section 27, is of identically the same construction as the advanceauger section 14 and is provided at one end with the tapered attachedsocket 28, and the diametrically opposite T-shaped slots 29,corresponding to the sockets 17 and the slots 18 of the advance augersection that has already been carried into the rock or coal. Theextension The extenauger-section 27, is connected with the end of e 1auger section is engaged with the connecting plug and lock-pin at oneend of the feed screw. The connecting plug or tenon 30, may be eithercast solid with the extension auger section or formed separately to bedriven into one end thereof and secured permanently therein by atransverse rivet 32, as illustrated in the drawings. section isconnected with the feed screw and After-the extension auger 1 theadvance auger section by the connections described, the drilling isproceeded with until it is necessary to connect another extensionsection onto the machine, and it will; of course be understood that asmany extension auger sections may be used as is necessary for theparticular Work being done.

a reversible feed screw provided at each end with a tapered connectingplug or tenon and a lock-pin projecting from opposite sides of said plugor tenon, the handle having a tapered socket adapted to fit the plug ortenon at either end of the screw and diametrically opposite T-shapedslots to detachably engage the lock-pin, and the drill auger sectionsprovided at one end with tapered sockets and diametrically oppositeT-shaped slots, the intermediate of such auger sections being furtherprovided at one end with a tapered said pin openings and adj ustablyengaging with the registering notches of the bits, said side bit beingprovided with a laterally curved cutting edge substantially as setforth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

LEWIS W. LE GRAND. Witnesses:

A. L. LE GRAND,

J. A. W001).

